Panasonic PT43LCX64 - MMD DIGITAL TUNER, Service Manual

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No sound from built-in both L-CH and
R-CH Speakers
Replace the Rear Jack C.B.A.
(All input are NG.)
Check that there is an audio signal to the Audio Out
Terminal from all input terminals.
Replace the Main C.B.A.
(Only HDMI input is NG.)
Replace the Main C.B.A.
(Only RGB 1 input is NG.)
No sound from built-in L-CH Speaker only
Press "MENU" button on the remote and select
"Audio" in MENU screen. Then press "OK."
Replace the L-CH Speaker.
Does the "BALANCE" screen becomes center position?
Set to the center position.
NO
YES
No sound from built-in R-CH Speaker only
Press "MENU" button on the remote and select
"Audio" in MENU screen. Then press "OK."
Replace the R-CH Speaker.
Does the "BALANCE" becomes center position? Set to the center position.
NO
YES
(Only Audio1, 2, Component
1, 2, OR 3 input is NG.)
(Only Tuner input is NG.)
(Only Audio3 input is NG.)
Replace the Rear Jack C.B.A.
OK
Replace the Audio Amp C.B.A. Still NG, Replace the Rear Jack C.B.A. Still NG, Replace the Power C.B.A.
Replace the Front Jack C.B.A. Still
NG, replace the Rear Jack C.B.A.
Replace the Tuner C.B.A. Still NG,
replace the Rear Jack C.B.A.
(Only RGB 2 input is NG.)
Replace the Front Jack C.B.A. Still
NG, replace the Main C.B.A.